Hello
This configuration likely fine but let's add for improving it.
On demand scanners: Hitman Pro or Emsisoft Emergency Kit
Extensions for Firefox: Adblock plus or Adguard for blocking ads in such uninterrupted browsing experience, and Lastpass password manager for storing logins of passwords.
Other software: CCleaner to clean those temp files, history, logs and others therefore a daily maintainance to clean and increase a little bit free space,
Lastly think before you click to avoid infections, other suggestions will be enforced by other members.